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[PATCH 9/9] migration/ram: calculate un/encoded_size only when needed.
From: |
Mao Zhongyi |
Subject: |
[PATCH 9/9] migration/ram: calculate un/encoded_size only when needed. |
Date: |
Wed, 3 Jun 2020 16:09:04 +0800 |
Signed-off-by: Mao Zhongyi <maozhongyi@cmss.chinamobile.com>
---
migration/ram.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/migration/ram.c b/migration/ram.c
index 41cc530d9d..ca20030b64 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -910,14 +910,15 @@ static void migration_update_rates(RAMState *rs, int64_t
end_time)
xbzrle_counters.cache_miss_rate = (double)(xbzrle_counters.cache_miss -
rs->xbzrle_cache_miss_prev) / page_count;
rs->xbzrle_cache_miss_prev = xbzrle_counters.cache_miss;
- unencoded_size = (xbzrle_counters.pages - rs->xbzrle_pages_prev) *
- TARGET_PAGE_SIZE;
- encoded_size = xbzrle_counters.bytes - rs->xbzrle_bytes_prev;
if (xbzrle_counters.pages == rs->xbzrle_pages_prev) {
xbzrle_counters.encoding_rate = 0;
- } else if (!encoded_size) {
+ } else if (xbzrle_counters.bytes == rs->xbzrle_bytes_prev) {
xbzrle_counters.encoding_rate = UINT64_MAX;
} else {
+ unencoded_size = (xbzrle_counters.pages - rs->xbzrle_pages_prev) *
+ TARGET_PAGE_SIZE;
+ encoded_size = xbzrle_counters.bytes - rs->xbzrle_bytes_prev;
+
xbzrle_counters.encoding_rate = unencoded_size / encoded_size;
}
rs->xbzrle_pages_prev = xbzrle_counters.pages;
--
2.17.1
- [PATCH 0/9] monitor/hmp-cmds: small improvements for migration, Mao Zhongyi, 2020/06/03
- [PATCH 6/9] monitor/hmp-cmds: add 'goto end' to reduce duplicate code., Mao Zhongyi, 2020/06/03
- [PATCH 5/9] monitor/hmp-cmds: delete redundant Error check before invoke hmp_handle_error(), Mao Zhongyi, 2020/06/03
- [PATCH 4/9] monitor/hmp-cmds: don't silently output when running 'migrate_set_downtime' fails, Mao Zhongyi, 2020/06/03
- [PATCH 9/9] migration/ram: calculate un/encoded_size only when needed.,
Mao Zhongyi <=
- [PATCH 2/9] tests/migration: fix unreachable path in stress test, Mao Zhongyi, 2020/06/03
- [PATCH 7/9] monitor/hmp-cmds: improvements for the 'info migrate', Mao Zhongyi, 2020/06/03
- [PATCH 3/9] monitor/hmp-cmds: add units for migrate_parameters, Mao Zhongyi, 2020/06/03
- [PATCH 8/9] docs/xbzrle: update 'cache miss rate' and 'encoding rate' to docs, Mao Zhongyi, 2020/06/03
- [PATCH 1/9] tests/migration: mem leak fix, Mao Zhongyi, 2020/06/03